Final answer:
Without the precise atomic mass of 131I, the binding energy per nucleon cannot be calculated. The formula involves dividing the mass defect (in MeV) by the total number of nucleons.
Step-by-step explanation:
To calculate the binding energy per nucleon for 131I (iodine-131), you would first need the atomic mass of 131I, which is usually available in a table of isotopes. However, since this information is not provided in the question, a precise calculation cannot be performed. The formula to use would be:
Binding energy per nucleon = (Total binding energy)/(Number of nucleons)
Where the Total binding energy is the mass defect (difference between the sum of the individual masses of protons and neutrons and the actual measured atomic mass of the nucleus) multiplied by 931 MeV/amu (the conversion factor from atomic mass units to megaelectronvolts). You would then divide that result by the number of nucleons (protons plus neutrons) to find the binding energy per nucleon for 131I. In practice, to determine the correct option from the given choices, the detailed atomic masses and the mass defect would be required.